Update gps_client.py continuous read with input

gps_client.py

@@ -10,63 +10,75 @@ run this way: python3 example1.py.txt
 
 import gps               # the gpsd interface module
 import time
+import signal
 
-try:
-
-    mode = -1    
-    lat = 0    
-    lon = 0    
-    alt = 0
-
-    session = gps.gps(mode=gps.WATCH_ENABLE)
-    
-    start = time.perf_counter()
+# Don't turn these signal into exceptions, just die. 
+# https://stackoverflow.com/questions/26692284/how-to-prevent-brokenpipeerror-when-doing-a-flush-in-python
+signal.signal(signal.SIGINT, signal.SIG_DFL)
+signal.signal(signal.SIGPIPE, signal.SIG_DFL)
 
+While True:
     try:
-#        while (session.read() == 0) and ((time.perf_counter() - start) < 2) and (mode < 2):
-        while ((time.perf_counter() - start) < 2) and (mode < 2):
-            if session.waiting(2.0):
-                session.read()
-                
-    #        print(gps.MODE_SET)
-     #       print(session.valid)
-            if (session.valid):
-                # not useful, probably not a TPV message
-    #            continue
     
-    #        print('Mode: %s(%d) Time: ' %
-    #              (("Invalid", "NO_FIX", "2D", "3D")[session.fix.mode],
-    #               session.fix.mode), end="")
-            # print time, if we have it
-#                print("%d " % session.fix.mode, end="")
-                if (session.fix.mode > mode):
-                    mode = session.fix.mode
-        #        if gps.TIME_SET & session.valid:
-        #            print(session.fix.time, end="")
-        #        else:
-        #            print('n/a', end="")
-            
-                if gps.isfinite(session.fix.latitude): 
-                    lat = session.fix.latitude
-                if gps.isfinite(session.fix.longitude):         
-                    lon = session.fix.longitude 
-                if gps.isfinite(session.fix.altitude):        
-                    alt = session.fix.altitude     
-#                print("%.6f %.6f %.6f" % (session.fix.latitude, session.fix.longitude, session.fix.altitude))
-               
-    #            else:
-    #                print(" 0 0 0")
+        mode = -1    
+        lat = 0    
+        lon = 0    
+        alt = 0
     
-    except KeyboardInterrupt:
-        # got a ^C.  Say bye, bye
-        print('')
+        session = gps.gps(mode=gps.WATCH_ENABLE)
+        
+        start = time.perf_counter()
     
-    # Got ^C, or fell out of the loop.  Cleanup, and leave.
-    session.close()
-    print("%d %.6f %.6f %.1f" % (mode, lat, lon, alt))
-#    exit(0)
+        try:
+    #        while (session.read() == 0) and ((time.perf_counter() - start) < 2) and (mode < 2):
+            while ((time.perf_counter() - start) < 2) and (mode < 2):
+                if session.waiting(2.0):
+                    session.read()
+                    
+        #        print(gps.MODE_SET)
+         #       print(session.valid)
+                if (session.valid):
+                    # not useful, probably not a TPV message
+        #            continue
+        
+        #        print('Mode: %s(%d) Time: ' %
+        #              (("Invalid", "NO_FIX", "2D", "3D")[session.fix.mode],
+        #               session.fix.mode), end="")
+                # print time, if we have it
+    #                print("%d " % session.fix.mode, end="")
+                    if (session.fix.mode > mode):
+                        mode = session.fix.mode
+            #        if gps.TIME_SET & session.valid:
+            #            print(session.fix.time, end="")
+            #        else:
+            #            print('n/a', end="")
+                
+                    if gps.isfinite(session.fix.latitude): 
+                        lat = session.fix.latitude
+                    if gps.isfinite(session.fix.longitude):         
+                        lon = session.fix.longitude 
+                    if gps.isfinite(session.fix.altitude):        
+                        alt = session.fix.altitude     
+    #                print("%.6f %.6f %.6f" % (session.fix.latitude, session.fix.longitude, session.fix.altitude))
+                   
+        #            else:
+        #                print(" 0 0 0")
+        
+        except KeyboardInterrupt:
+            # got a ^C.  Say bye, bye
+            print('')
+        
+        # Got ^C, or fell out of the loop.  Cleanup, and leave.
+        session.close()
+        print("%d %.6f %.6f %.1f" % (mode, lat, lon, alt))
+    #    exit(0)
+        
+    except:    
+        print("-1 0 0 0")
+        exit(0)
+    try:
+        inp = input()
+#        print(inp)
+    except:
+        print("Python error getting input!")        
     
-except:    
-    print("-1 0 0 0")
-    exit(0)
-